10/20/30 years? Look those aren't the days of Henry Ford or J.D.Rockefeller.. tech is changing ever-faster at an exponential rate. You wanna create products for 30 years, none of which will live on their own much longer than 3-4 years (if lucky/successful in their market) because everything is constantly changing? I agree: flipping a messenger toy to FB is a "lottery win", but "a sustainable business that will generate revenue" for 30 years, what is that supposed to be in today's environment? That's a bit of a pipe dream too, just the "nobler" one.
I imagine they made ~$100m last year (400m active users, I'm guessing 100m of which using for more than a year), which is almost guaranteed to go up. For a company with ~50 employees how is that not sustainable?